Boat



' April 22, 1930.,

E. BuMx-:STER ET AL BOAT " Filed Nov. 2e, 1928 frauen/fard: rnJZLarww/Lsfer aan] Herv/bn Hezn/ Patented Apr. 22, 1930v GERMANY,

ERNscr BURMEsTER, oE BURG, NEAR BREMEN, AND HERMANN HEIN,0F BREMEN,

ASSIGNORS TOy YACI-IT- UND BOOTSWERFT BURMESTEBUM. B. H., 0F

BURG, NEAR BREMEN, GERMANY, A CORPORATION l0F GERMANYY" BOAT Application filed November 26, 19.28, Serial No. 822,020, and-in Germany March 6, 192.8'.

The present invention relates to boats,

especially to lifeboats, and an object of this invention is to provide a new method of constructing boats. Another object of this invention is to increase the air content of the boat and thereby the floating properties of j the same by suitably constructing and ar-l ranging the seats.

According to this invention a boat is provided with transverse seats which consist of hollow fluid tight chambers iilled with airn versely arranged withV respect to the lengthV of the boat imparts to vthe latter a satisfact-ory transverse rigidity as such seats take the place of the usual special Ystiening means. These hollow members also obviate all necessity for the usual air chambers disposed along vthe sides of the boat. The proper maintenance of the air chambers, which are of course large according to this method of constructionV is easier thanV that of the small air chambers provided by other constructions. Moreover the construction of the seats themselves as air chambers leaves the space `free in Y the boat which would otherwise be taken up by the air chambers, The hollow transverse chambersV may be divided by partitions so lthat ii' a leak occurs only a part of the cham` bei' is filled. Y

The accompanying drawings show diagrammatically anv example lof construction according to the invention in longitudinal section in Figurey 1 and in plan in-Figure 2.

Similar views of a Vmodied construction are l V'formtransverse seats.` They are further proi vided with channels forfconveying watei which may accumulate between them. Each chamber has at least one access opening or `the individual intermediate spaces.

yman hole cfthrough which its inside `a'c-I,l Y

cessible.

Y' The chambers can also bedivided by partitions Z transversely to their length,` as shown in Figuref, so that if aleak occurs these'- parti-tionsfprevent the whole ofthe chamber being iilled. In this case eachv division of the hollow member is provided with an access opening or man hole.'r

In, the construction showiiin lligures 3 and Aknown suitable obturator, are constructed iii each ofthe channels and may beoperated from outside.V Each individual channel Z) can lbe closed'by lthese" closing means so that-the n flow of water through the spaces 'd and f. can

l closing means e, which may consist of anyV be interrupted at'any desired place. For instance if a leakroccurs in one of the inter mediate spaces 'f between the seats the adjacent' channels ZJ can be closed and thus the in-flow of water is restricted to this intermediate `space only." Again, the inflowing water can be led off in a certaindirection only by lclosing only one of the adjacent channels and Y in this way led, for example to a pump.;

two closable channels foreach hollow'member are shown. One of these channels generallyserves as a reservev channel. More than two channels can however be provided for each hollow member and they caribe used to regulate the flow of water through the boat in accordance with Vthe Water accumulated in y y Thus the water can be distributed to keep the boat level or the water accumulated more atone place can'be fed quicker in one direction. The same object can be attained'by suitably ladju'sting'the closing means.

We claim:

1. boat comprising sided and stepped transverse seats arranged in the boat, each seat provided with a channel running therethrough, said seats consista pluralityof doublein the drawings, for the sake of example, f

ing of hollow gas-lilled luid'tight chambers. l

vico

of hollow gas-filled fluid tight chambers, and closing means for said channels.

3. A boat comprising a plurality'of double-sided and ,stepped transverse seats ari'angedinthe boat, each seat provided with a Channel riinning therethrongrh7 said seats consisting of hollow gasfilled luid tight Chambers, closing means for said ohannelsi -and independent actuating means for each 10 set of said closing in e'ans. n, Y y

j A hoat Comprising a plurality of double-sided and stepped transverse seats, ,each having at least one ytransverse*channel theref in, saidseats onsi'st'ing of hollow `gas-'filled luidtight chambers. I y

45. A boat comprising va plurality 'of 'double-,sided and stepped transverse seats leac-h Consisting of a hollow fluid tight chamber Y extending tothe bottoni of 'the boat, said 2o seats having two openings therein and being traversed (by channels, and a transverse partition in each of said 'chambers arranged between the openings. 1 f e 6. A boat comprising'a pliirality of douu ble-'sided and stepped transverse seats arranged inthe boat, leach seat provided with -a channel running therethrough, said seats ,consisting of hollow gas-filled 'fluid tight Chambers, and closing means for said chan- "'e nels and aotna'ting rneans ltherefor disposed in spaced relation from said closingmeans. 1* A7. -A looat comprising a rplurality of ,donble-sided and stepped VtransverseV seats oonsisting of hollow iuid rtight air 'oh`an1hers having access openings therein and traversed by Channels, a 4transverse partition in each air chamber, an oliturat'or 'in/each channel, yand a set of Closing 'means for 4each' obtiraton. Y Y

40 l In 'testimony whereof we alx our'signatures. v. ERNST BURMESTER. 

